| Callsign | W6OST |
| Radio Service | HV - Vanity |
| License Status | A - Active |
| Grant Date | 2017-01-17 |
| Effective Date | 2026-02-27 |
| Expire Date | 2027-04-03 |
| Cancel Date | |
| Last Action Date | 2026-02-27 |
| End Date | 2027-04-03 |
| Available Date | 2029-04-04 |
| Applicant Type | B - Amateur Club |
| Entity Name | John Harlan Memorial Amateur Radio Club |
| Street Address / Locality | 7424 State Highway 36 Carlotta, CA 95528 |
| County | Humboldt County |
| Zip Location | 40°29'49.1"N 123°55'50.9"W |
| Maidenhead | CN80al |
| FRN | 0008153264 |
| Licensee ID/SGIN | L00613549 / 000 |
| Licensee Class | |
| Callsign Group | C - 1x3 |
| ULS/Geo Region | 6 / 6 / CA |
| Prev Callsign / Prev Class | KI6IHJ |
| Next Callsign | |
| Trustee Callsign / Trustee Name | N6HBJ Arsanis, Michael G |
| Vanity Type | F - By List (Club) |
| ULS File Number | 0011924823 |
| Phonetic weight / Morse weight | 10 / 54 |